Walter s



(No Model.)

.W. S. PIERCE.- OIL EXTRAGTOR AND DRIER.

No. 546,708. Patented Sept. .24, 1895 f gvwemtoz ANDREW EGRAIIAM. PHOTOMTHQWASNINGTD N D.C

NITED- STATES ATENT O FI E.

WALTER S. PIERCE, OF YORK, N. Y.

. OI EXTRACTOR AND DRIER.

SPECIFICATION formin part of Letters Patent N5. 546,708, dated September 24, 1 95. Application filed January 29, 1895.: Serial No; 536,537 (No model.)

To all whom it may concern:

Be it known that I, WALTER S. PIERCE, a citizen of the United States, residing in New York city, in the county .and State of New York, have invented a certain new and useful Improvement in a Combined Digester and Drying Apparatus, of which the following is a specification.

This invention is an improvement upon the form of apparatus shown in an application for Letters Patent filed by me July 27, 1894, Serial No. 518,702.

The object of my invention is to provide an apparatus for the separation of oleaginous substances from such materials as cotton or other seed, refuse of any kind, &c., and the drying of the refuse; and my present improvement consists in the simplified construction of such apparatus whereby its bulk is reduced and it is rendered less expensive to manufacture, while at the same time its working capacity is increased to some extent.

In the accompanying drawings, forming part of this specification,'Figure 1 is a central longitudinal section of my improved apparatus, taken on the line 1 1, Fig. 2, with certain portions broken away. Fig.2 is acrosssection thereof, taken on the line 2 2, Fig. 1.

A is the exterior shell of the apparatus,

having a hopper B, the configuration of the shell in cross-section being best shown in Fig. 2, where it will be seen that provision is made for four cylinders or chambers, two large ones (3 O and two small onesD D, the latter being situated below the former. The inner circle of these severalcylinders is completed or partially completed by sliding in place segments of the proper shape. In the case of the cylinders O the upper segment is somewhat less than a quarter the diameter of the entire cylinder and is slipped into the channel C preferably cast with the outer shell, to which channel the said segment may be secured, if desired, by bolts or otherwise. The lower segments 0 are perforated to form a screen or sieve, the perforations being lettered C and are likewise slipped into channel 0 to which they may be secured by bolts or otherwise. The cylinders D are not completed, there being but one segment D for each of said cylinders, whereby the upper part of the cylinder is open throughout its length, for the purpose hereinafter set forth. The segment D is secured in the manner above described in connection with the segments for the cylinders O, and hence need not be more particularly referred to. Eachof the cylinders is provided with a revoluble shaft E, carrying screw-conveyor blades F, whereby the contents of the apparatus are thoroughly stirred and conveyed through the same. These blades terminate at the end of each shaft toward which the material is conveyed in straight wings F, which aid in forcing the material from one chamber into the other. In Fig. 1 to the right are shown the wings F, mounted on the shafts of each of the nearer two compartments, while the left-hand ends of the said shafts and the screw-propeller blades thereon are broken away to show the wings on the shafts of each of the two farther compartments.

The lower perforated segments 0 of the cylinders 0 do not extend the full length of the cylinder, but, as shown in Fig. 1, terminate at some distance from the ends thereof. By thus shortening the segments 0 the cylinders are put in communication one with the other at each end, and, as will be obvious, the material from one cylinder can be fed into and through the next cylinder, aided by the wings F, and hence the material undergoing treatment can be fed continuously from one cylinder to the other in one direction, or the direction of feed can be reversed by reversing the direction of rotation of the shaft E and the material fed in the opposite direction.

The space between the ends of the segments O and the ends of the cylinders is provided with a perforated plate 0 as shown. A series of steam or other heating pipes G is located between the cylinders, as shown in Fig. 2, whereby the ordinary steam-jacket exteriorly surrounding such an apparatus is dispensed with and economy of space secured, as well as reduction in expense of construction. Steam is supplied to these pipes in any suitable way and they are hung or otherwise supported from the shell. Doors H H are provided for the discharge of the solid material being treated, a pipe I for the discharge of the liquid contents, and a steam-blast J, which aids in freeing the screen when clogged.

The operation of the apparatus is as follows:

The material to be treated is introduced through the hopper B into the cylinders C, and the mechanical stirrer set in operation. If desired, a solvent, such as hydrocarbon, may be introduced with the material undergoing treatment. The contents of the cylinders are heated through the pipes G. The oil and other liquid contents of the material undergoing treatment will pass through the screens C and G into the cylinders D, from whence they can be withdrawn through the pipe I. By converting the segments of the cylinders 0 into screens economy of space is secured, as well as cheapness of construction.

I claim- 1. The combination of a pair of cylinders, mechanical stirrers therein contained, a series of steam-pipes located between said cylinders,

' a second pair of cylinders below the first and in line therewith, a sieve or screen located between the upper and lower pair of cylinders, and steam-pipes located in the space between said cylinders, substantially as set forth.

2. The combination of a pair of cylinders, a part of said cylinders being perforated to form a sieve, another pair of cylinders located below the first pair but in line therewith, and steam-pipes in the space between the two pairs of cylinders, substantially as set forth.

3. The combination of a pair of cylinders, a part of said cylinders being perforated to form a sieve, said perforated portion not extending to the ends of the cylinders, a further perforated plate extending between the ends of the perforated part of the cylinder and the cylinder ends, a second pair of cylinders be low the first, and steam-pipes located in the space between the two pairs of cylinders, substantially as set forth.

4. The combination of a pair of cylinders arranged side by side and with a space at their ends, a screw conveyor in each cylinder, and straight wings on one end of each of the shafts carrying the screw conveyer blades, substantially as set forth.

This specification signed and witnessed this 24th day of January, 1895.

XVALTER S. PIERCE.

Witnesses:

JOHN R. TAYLOR, GEORGE E. SIMPSON. 

